Globe at Night

Measure the brightness of your night sky and share your observations with other citizen scientists.

What is Globe at Night?

Globe at Night is an international campaign to raise public awareness about the impact of light pollution. The programme invites citizen scientists to measure their night sky brightness and submit their observations from a computer or a smartphone. Light pollution threatens not only our ‘right to starlight,’ but can also affect energy consumption, wildlife, and health. Over the last 9 years, people in 115 countries have contributed to more than 100,000 measurements, making Globe at Night the most successful light pollution awareness campaign to date!

What do you do?

Explore the last 9 years of data in our interactive data map or see how your city performed with our regional map generator. The Globe at Night website is easy to use and contains abundant background information. The database can be compared with other databases, to know, for example, how light pollution affects the foraging habits of bats. You can learn about observing the sky and share your observations with the scientists.